Tool for inserting insulator screws



Nov. 2, 1965 e. c. SWENSON TOOL FOR INSERTING INSULATOR SGREWS FiledOct. 25. 1961 INVENTO]? Gannon! C. SwsM' BY .........nnuuml\\\\\\l\\\\\\United States Patent 3,215,177 TOOL FOR INSERTING INSULATOR SCREWSGordon C. Swenson, 310 Arbuckle Road, Erie, Pa. Filed Oct. 25, 1961,Ser. No. 147,510 1 Claim. (Cl. 145--50) This invention relates to toolsfor driving screws and, more particularly, to tools for driving screwsinto public utility poles, building walls, and the like for supportingelectrical power line wires.

Tools for driving screws for supporting insulators have been madepreviously as shown in Patent Nos. 685,606 and 1,619,043. Also, toolsfor driving curved screws for supporting insulators have been made asshown in Patent No. 2,437,762. In order to drive each type of screwshown in the patents, a separate tool is required.

The present invention contemplates the use of a single tool for drivingboth types of screws shown in the first two mentioned patents so that alineman need carry only a single tool in his truck in order to installeither type of insulator.

It is, accordingly, an object of the present invention to provide animproved combination tool for driving a plurality of types of screws.

Another object of the invention is to provide an improved tool.

A further object of the invention is to provide a tool which is simplein construction, economical to manufacture, and simple and efiicient touse.

With the above and other objects in view, the present invention consistsof the combination and arrangement of parts hereinafter more fullydescribed, illustrated in the accompanying drawings and moreparticularly pointed out in the appended claims, it being understoodthat changes may be made in the form, size, proportions, and minordetails of construction without departing from the spirit or sacrificingany of the advantages of the invention.

In the drawing:

FIG. 1 is an isometric view of a tool according to the invention; and

FIG. 2 is a view similar to FIG. 1 of the other type of tool accordingto the invention.

FIG. 3 is a longitudinal cross sectional central view taken through FIG.2.

Now with more particular reference to the drawing, a tool is intended todrive screws such as shown at 11 and to also drive screws such as screw12; that is, either the screw 11 or the screw 12 can be driven by thetool 10. The tool is made up of a handle 14 which has a screw drivershaft 15 slidably and reciprocably received in a central bore 26therein.

The shaft 15 has a screw driver blade 16 on one end and on the other enda groove or bifurcated part 17 which, in practice, fits over the roundside of a screw such as the screw 12. The intermediate part of the screwdriver blade 16 is threaded and the threaded part engages a threadedbore in a handwheel 18. The handwheel 18 is disposed in a slot 29 whichintersects the bore 26.

A slot 30 is formed on one side of the handle 14 and it extends aroundthe end thereof opposite a cleft 20. Therefore, the curved part of thebody of the screw 12 rests on the bottom of this groove and is rigidlyheld for driving. The body has the generally T-shaped slot therein whichdefines the cleft and this cleft receives a flange 22 on an insulator19. The flange is received in the cleft as shown in the aforesaidpatents. A bore 23 in the handle 14 intersects the bore 26.

3,215,177 Patented Nov. 2, 1965 When the handwheel 18 is rotated in onedirection, the shaft 15 moves toward the cleft 20 to force the blade 16into the slot in the screw 11 and therefore clamp the insulator 19 inthe cleft 20 between cars 21 and the bottom of the cleft.

When the handwheel 18 is rotated in the other direction, the shaft 15 ismoved toward the screw 12 so that the legs of the bifurcated part 17 aremoved to receive the side of the screw and clamp it in the bore 23.

In operation, the screw 12 is put through the bore 23 in the handle andthe handwheel rotated until the shaft 15 brings the bifurcated part 17firmly around the screw 12. Then the operator can hold the handle 14 inhis hand and strike the screw 12 attached to the handle against abuilding to start the screw 12. The operator can then rotate the handle14 to screw the screw 12 into the building.

In order to use the other type of screw 11, the device operates exactlyas in the aforesaid patents.

The foregoing specification sets forth the invention in its preferredpractical forms but the structure shown is capable of modificationwithin a range of equivalents without departing from the invention whichis to be understood is broadly novel as is commensurate with theappended claims.

The embodiments of the invention in which an exclusive property orprivilege is claimed are defined as follows:

A screw driver mechanism for workpieces such as a curved insulator screwcomprising a handle,

a shaft threadably received and reciprocably movable in a threaded borein said handle,

a hole in said handle angularly disposed relative to said shaft andintersecting said threaded bore for re ceiving the body of a workpiece,

a first slot in one side of said handle,

said first slot terminating at one end at the end of said handle remotefrom said shaft,

said first slot terminating at its other end at said hole,

said shaft having a flat sided handwheel attached to it,

said shaft terminating adjacent said hole in a bifurcated end defining acurved end surface,

and a second slot extending through said handle,

said handwheel being disposed in said second slot and extending beyondthe outside thereof,

said first slot being adapted to receive a curved workpiece with a partof said workpiece extending through said hole and said bifurcated end ofsaid shaft in surface contact with said workpiece whereby said workpiecemay be held in said hole.

References Cited by the Examiner UNITED STATES PATENTS 48,027. 5/65 Park-64 510,104 12/93 Uhl. 685,606 10/01 Henry 145-50 FOREIGN PATENTS824,774 12/59 Great Britain.

WILLIAM FELDMAN, Primary Examiner.

DONALD R. SCHRAN, WALTER A. SCHEEL,

Examiners.

